make sure to know the storage node address before connecting to it for replication

git-svn-id: https://svn.erp5.org/repos/neo/branches/prototype3@594 71dcc9de-d417-0410-9af5-da40c76e7ee4

neo/storage/replicator.py

@@ -299,6 +299,9 @@ class Replicator(object):
             return
 
         addr = node.getServer()
+        if addr is None:
+            logging.error("no address known for the selected node %s" %(node.getUUID()))
+            return
         if self.current_connection is not None:
             if self.current_connection.getAddress() == addr:
                 # I can reuse the same connection.